Organic IntermediateChina 4-Chloro-4′-Fluorobutyrophenone CAS3874-54-2 Factory Price 3874 54 2 Best Manufacturer, Find details about China 3874-54-2, CAS3874-54-2 from 4-Chloro-4′-Fluorobutyrophenone CAS3874-54-2 Factory Price 3874 54 2 Best Manufacturer